1000Mbps Gigabit Ethernet Converged Network Adapter (NIC) | with Intel 350 Chip | Ethernet PCI Express NIC Network Card | Quad Copper RJ45 Ports | PCI Express 2.1 X4 | Compare to Intel I350-T4

I was using Realtek cards with my pfSense build before, which FreeBSD has a lack of support for. My internet would constantly drop, etc. But this card works wonders with it, and haven't had a connection drop of quirk ever since. Perfect for a home pfSense build.

A bit pricey but works very well so far - recommended. Speed is as expected and it's easy to install.

This card is detected right a way in debian 11 and openwrt without any issues and it works great. It comes with two brackets and I was able to change the long one to mini one and fit this into my dell optiplex 7010 small factor pc which is now my router + nas in one box. I recommend this card.

Having had enough of using awful ISP provided routers, I decided to use an old Dell Optiplex to build a router based of OPNSense so needed an additional network port in the system. The card was a simple solution, cheap and easy to install and works perfectly with OPNSense. All setup and running and so much better.

Working under Ubuntu LTS 20.04 using the IGB Driver. The MAC refers to Beijing Sinead Technology Co., Ltd. in China not Intel Corp so maybe it's a clone of the 82576 chip and not genuine Intel hardware. LAG and VLAN working fine. As people have mentioned, trying to use full 4Gbps bandwidth causes a drop in speed, even though it's connected to a 4x@PCIe2 Slot as confirmed by the LSPCI report which gives 16GBps in each direction, it should have more than enough bandwidth to saturate. LSPCI Report: LnkCap: Port #0, Speed 2.5GT/s, Width x4, ASPM L0s L1, Exit Latency L0s <4us, L1 <64us ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp- LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 2.5GT/s (ok), Width x1 (downgraded) TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- Here's what LSHW reports for both interfaces: description: Ethernet interface product: 82576 Gigabit Network Connection vendor: Intel Corporation physical id: 0 bus info: pci@0000:02:00.0 logical name: enp2s0f0 version: 01 serial: 80:61:5f:xx:xx:xx size: 1Gbit/s capacity: 1Gbit/s width: 32 bits clock: 33MHz capabilities: pm msi msix pciexpress bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=igb driverversion=5.6.0-k duplex=full firmware=1.2.1 ip=xxx.xxx.xxx.xxx latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s

Had troubles with connection dropping on my pfsense virtual machine. Turned out to be the Realtek Nic I was using. Swapped over and runs perfectly Easy to install

Perfect

Works with proxmox pass-through to a vm router / opnsense. Can't comment on the performance as i only have 70Mbit internet but processor usage is almost 0 while running a speed test so something is working well behind the scene and i assume it supports IOSRV for virtual environments. Not noticed an increase in power usage on my hypervisor either so that's a bonus.